General Science Jkssb Biology Set 1 Mcqs (605 MCQs) | JKSSB & SSC Quiz

General Science

jkssb biology set 1 mcqs

Download PDF

Topics

jkssb physics set 1 mcqs jkssb chemistry set 1 mcqs jkssb biology set 1 mcqs

Practice Questions

605 Total
Question 201 Discuss
Ask a Friend

Which cell organelle is the energy factory of cells and is an important hub for intracellular organelles?

A
Golgi apparatus
B
Lysosomes
C
Mitochondria
D
Peroxisomes

Answer & Explanation

Correct Option: C

Mitochondria are double-membrane-bound organelles that generate most of the cell's ATP, earning them the title of 'energy factories'. They are essential for cellular respiration and regulate vital metabolic pathways.
Question 202 Discuss
Ask a Friend

Which organelle is responsible for producing ATP, the cell's energy currency?

A
Nucleus
B
Mitochondrion
C
Golgi apparatus
D
Endoplasmic reticulum

Answer & Explanation

Correct Option: B

The mitochondrion is the primary site of oxidative phosphorylation in eukaryotes, a process that produces ATP (adenosine triphosphate). This molecule stores and transfers the chemical energy required for cellular processes.
Question 203 Discuss
Ask a Friend

Which of the following represents the correct sequence of the upper digestive tract?

A
Windpipe --> Food pipe
B
Mouth --> Rectum
C
Oesophagus --> Stomach
D
Stomach --> Rectum

Answer & Explanation

Correct Option: C

In the human digestive system, food is swallowed and travels down the muscular tube called the oesophagus, which uses rhythmic peristaltic movements to transport the food directly into the stomach.
Question 204 Discuss
Ask a Friend

Which part of the cell is responsible for generating the primary energy molecule ATP in eukaryotic animals?

A
Mitochondria
B
Vacuoles
C
Endoplasmic reticulum
D
Cell wall

Answer & Explanation

Correct Option: A

Mitochondria process nutrients and oxygen to produce ATP, serving as the main energy source for eukaryotic cells. Their evolutionary origin is thought to be from an ancient symbiotic relationship with aerobic bacteria.
Question 205 Discuss
Ask a Friend

The type of carbohydrate predominantly found in potatoes is .

A
Sugar
B
Glucose
C
Starch
D
Fructose

Answer & Explanation

Correct Option: C

Potatoes are primarily composed of starch, a complex carbohydrate (polysaccharide) made of long chains of glucose units. Plants synthesize and store starch in root tubers as a major energy reserve.
Question 206 Discuss
Ask a Friend

Food rich in carbohydrates (like potatoes) and those rich in fats (like butter) are also known as .

A
Energy-Giving Food
B
Main Course
C
Unsafe Food
D
Fast Food

Answer & Explanation

Correct Option: A

Carbohydrates and fats are biologically classified as macronutrients that act as the body's primary fuel sources. Therefore, foods abundant in these nutrients are often termed 'energy-giving foods' in nutritional science.
Question 207 Discuss
Ask a Friend

On cold pressing groundnut, oils are released. This indicates the presence of .

A
Carbohydrates
B
Fats
C
Vitamins
D
Proteins

Answer & Explanation

Correct Option: B

Groundnuts (peanuts) naturally contain high levels of lipids, which are organic compounds that include fats and oils. Cold pressing physically extracts these lipid reserves without using heat, demonstrating their high fat content.
Question 208 Discuss
Ask a Friend

Which of the following is a bone disease caused by a severe deficiency of vitamin D, calcium, or phosphate?

A
Rickets
B
Pertussis
C
Dementia
D
Polio

Answer & Explanation

Correct Option: A

Rickets is a condition that affects bone development in children, leading to weak or deformed bones. It is predominantly caused by inadequate vitamin D, which is required for effective calcium and phosphate absorption.
Question 209 Discuss
Ask a Friend

Which of the following organelles contains digestive enzymes to break down waste materials and cellular debris?

A
Nucleus
B
Mitochondrion
C
Lysosome
D
Vacuole

Answer & Explanation

Correct Option: C

Lysosomes are spherical vesicles that contain acidic hydrolytic enzymes capable of breaking down all kinds of biological polymers. They function effectively as the digestive and waste disposal system of the cell.
Question 210 Discuss
Ask a Friend

Which of the following demineralises the enamel of the teeth?

A
Acids produced by bacteria
B
Saliva
C
Toothpaste
D
Soft toothbrush

Answer & Explanation

Correct Option: A

Dental plaque contains bacteria that metabolize dietary sugars into lactic acid. This localized acidic environment drops the pH and leads to the demineralization of the calcium phosphate crystals that make up tooth enamel.
Previous Next